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Old 12-16-2016, 06:48 PM   #1
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How to test automatic transfer switch?

How do you test a iota its-50r automatic transfer switch? I have brand new batteries but I'm having problems with my inverter going in and out. I've made sure all my power leads are tight. The inverter is showing a power fault (flashing green light). Our motorhome is a 2005 Monaco knight. On the outlets that are not hooked up to the inverter it shows super high power coming from wall outlet. The inverter shuts off due to the high power. My progressive industry surge protector shows the power is good coming from the park on both L-1 and L-2. I'm puzzled and need help. I still think it's the automatic transfer switch.
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Old 12-16-2016, 06:55 PM   #2
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Just a guess but.....do the flashing lights go on in a sequence or pattern? If you have the manual maybe it will tell you something.
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Old 12-16-2016, 07:04 PM   #3
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Cant tell you much about the inverter issue but to test the Iota T/S, disconnect it, by-pass the unit, then see if the inverter problem persists. Not really sure how a T/S would create "super high voltage". If the Iota unit is OEM [ie a circa 2005 unit], leave it unplugged, then throw it in the trash. Most units of that age have been replace due to failure or fire. Look at Lyght or Progressive Industry products as a replacement......
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Old 12-16-2016, 07:11 PM   #4
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Yeah the manual said it was a voltage problem. It said he can be there too high or too low.
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Old 12-16-2016, 07:12 PM   #5
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Yeah I figured for a couple hundred bucks I can go ahead just get a new transfer switch cheaper than calling a repair guy to come out for that
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Old 12-16-2016, 07:35 PM   #6
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If you don't have a manual for it, I've dug one up from my files. It has an operational and troubleshooting sections. I have it attached to this post.

That model did have a recall back in 2012, I believe. Hopefully you had that done.

If you want to replace it, two of the alternatives are:

1. WFCO T-57

2. PowerMax PMTS-50


.
Attached Files
File Type: pdf Iota-50rmanual.pdf (90.2 KB, 85 views)
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Old 12-16-2016, 09:02 PM   #7
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Switching power sources under load can shorten the life of a transfer switch, burn the contacts creating high resistance, or completely destroy the switch.
Ever watch the power company line workers when they pull a disconnect switch? There is a high voltage (7,200VAC) "lightning" spark that burns/melts the contacts if the worker doesn't do it correctly.
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Old 12-17-2016, 06:08 AM   #8
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I am trying to figure how a transfer switch could cause "super high power" to the non inverter outlets. Did you use a meter to test the voltage at those outlets and the pole where the cord is plugged in?
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Old 12-17-2016, 08:13 AM   #9
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A transfer switch will not boost power. If the high power is on the non inverted power side it MUST be conning from the power pedestal. Do you have a meter or a Kill A Watt meter to tell what voltages you have?

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Old 12-17-2016, 08:19 AM   #10
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Super Hi Power - what is the voltage.
Most issues where you are reading higher then normal - over 125, can be caused by a bad neutral.
So, start your generator, what happens?
Read the power at the pedestal, then input to ATS? Then output to the main dual breaker.

Come back with results.
Why shotgun something until you have located the issue.

And yes it the neutral inside the ATS goes bad, then high voltage.
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Old 12-17-2016, 08:26 AM   #11
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Quote:
Originally Posted by gatorcq View Post
Super Hi Power - what is the voltage.
Most issues where you are reading higher then normal - over 125, can be caused by a bad neutral.
So, start your generator, what happens?
Read the power at the pedestal, then input to ATS? Then output to the main dual breaker.

Come back with results.
Why shotgun something until you have located the issue.

And yes it the neutral inside the ATS goes bad, then high voltage.
Thanks for offering up as to how the transfer switch could cause the higher voltage.
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Old 12-17-2016, 09:02 AM   #12
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Yes I think at this point it's the ATS the voltage on the post at the meter it shows good. I have a progressive Industries surge protector and it shows about 120 volts on L1 and L2. Plus the surge protector has a high voltage cut out.
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Old 12-17-2016, 09:04 AM   #13
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I want to thank everybody for their response. I think I'm going to go with the PowerMax pmts - 50. Does anybody have any idea if that a good automatic transfer switch
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Old 12-17-2016, 09:11 AM   #14
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Quote:
Originally Posted by Dave0559 View Post
How do you test a iota its-50r automatic transfer switch? I have brand new batteries but I'm having problems with my inverter going in and out. I've made sure all my power leads are tight. The inverter is showing a power fault (flashing green light). Our motorhome is a 2005 Monaco knight. On the outlets that are not hooked up to the inverter it shows super high power coming from wall outlet. The inverter shuts off due to the high power. My progressive industry surge protector shows the power is good coming from the park on both L-1 and L-2. I'm puzzled and need help. I still think it's the automatic transfer switch.
what Switch? main transfer switch or the inverter transfer switch
The power should just flow through the inverter when on SP so even if power is high I would think all outlets should have a reading
what kind of reading do have how many volts ?
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